Gary wrote:

Yup, you are absolutely right. After I hit the return key I realized
my mistake. Grain alcohol (i.e. moonshine) is used in Gasoline, hence
the increase in corn prices. Not denatured alcohol (e.g. Methanol).

Methanol is not the same as denatured alcohol, either. Denatured alcohol
is ethanol that has been intentionally contaminated with methanol.